Which one of the following is not a state function?
Correct answer: A. Work
- A. Work
- B. Enthalpy
- C. Internal energy
- D. Pressure
Explanation
The thermodynamic state of a system refers to the temperature, pressure and quantity of substance present. Examples of state functions include density, internal energy, enthalpy, entropy. State functions only depend on these parameters and not on how they were reached, So Work is NOT a state function and hence is the correct option.
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About Thermal Equilibrium and Heat
Thermal equilibrium means that bodies in contact have the same temperature and no net heat flows between them. The topic distinguishes heat from temperature, uses the zeroth law of thermodynamics, and covers heat transfer, specific heat capacity, thermal expansion and the conditions for reaching equilibrium.
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